Telegraph sounder



Mmew

J. H. KiNSLEY TELEGRAPH SOUNDER Filed March 27, 1920 tj atented lay l, lhitiia i ll il if y TELEGRAPH F301) l l'lDlElkii.

application filed March 27, teen. Serial no. assess.

77 whom it vita-y] (70771387 71;

l it known thatl', Jenn H. Krnsnnr,

alcitisten of the United States, residing at Clinton, in the county oi: l vorcester and titate of lVlassalc-husetts have invented a I -1 i q new and. useiul Tele raoh taounder 01 which lowing 15 a specification.

'lhis invention relates to a telegraph sounder of the usual lever type. Such sounders are commonly,provided with an ad usting screw and lock nut, by which the movement ofthe armature lever may be ad ji zsted and maintained.

In large oiiiees, an operator may have a considerable" number i (it different sounders, on any. one of whichamessageihay be received. It is desirable under these conditionsito he able to reduce or soften the soul .rom all of the sounders except the one on which the message is receivechin order" that the message may be accurately i read. This has been acoinplished in sev eral different ways, as by moving the nets from operative position, locking the armaturelever, or by using a relay and. local batteries when a loud tone is desired.

The fir t described methods are obj (action able aslthe operator may easily forget to restore the disabled soiinders to operative condition after receiving his message and in this case hewill thereazttermiss all calls made on the disabled sounder-s; The method of using relays and local batteriesis expen sive and considerably complicates the equipinentof each office.

lit 1s the ob ect oi my invention to pro vide improved means tor va ying the tone of the instrument without disturbing the regular adjustment thereof. In the p eferred form, my invention permits the sounder to operate with a subdued tone at all times except when a message is to be received, when a simple adjustment of the sounder causes the same to deliver the ineswsage [11 a loud and clear tone.

ll/ly invention further relates to certain 3 constructlons' and arrangements of parts iiti which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown in the drawings, in Wl116l1- Fig.1 is a side elevation of a common lorm of telegraph sounder with my invention applied thereto;

2 is a plan View thereof;

fi ig. 3 is a detail side elevation partly in section;

lhg; l- 1s a frame 10, magnets 11, an armature 12, and

an armature lever13 mounted upona fixed pivot 14. A spring 15 normally holds the lever 13 against the end of an adjusting screw 15 which is held in adjusted posi' tion in the frame by a look nut 16. A

stud or pin 17 (Fig. 2%) commonly extends downward from the lever 13 in position to engagean arm or projection 18 of the frame 10. duced by engagement of the stud 17 with the projection 18 and the loudness of the sound depends largeiy upon the: travel of the lever between the adjusting screw and the projection 18. Uther conditions? remaining duces a louder tone. All of the parts thus far described are or may be of the usual commerc :1 construction.

lily invention consists in a device for limiting; the travel oi the lever 13 indepeiulently of the adjusting screw 15, and as shown in the drawings, comprises a disc 20 held against the under side of the lever lii and loosely centered by the stud 17. The disc 20is held in position by a spring 21 embracing the lever and holding the disc firmly against the under side of the lever. 'l he spring may be conveniently held in position by the screw 19 which also locates the armature 12.

Projections 22 and 23 are provided on the under side oi? the disc 20 which engage the sides oi the arm or projection 18 of the frame 10 and limit angular movement of the disc in both directions. Between the projections 22 and 23 additional projections 24 and 25 are provided, so positioned The sound of the instrument is prounchanged, increased travel pro omitted.

of the projection 24 with the part 18 or by engagement of the regular sounding stud 17, With said part. The projection is slightly longer than the projection 24 and reduces the travel of the lever 13 when positioned above the part 18, the remaining motion permitting the sounder to deliver only a soft or subdued tone.

Having described the construction of my improvement, the operation thereof will be apparent. All of the sounders are normally set with the projections 25 above the parts 18, so that they deliver reduced sounds and they are allowed to remain in this position until the operator hears his call on one of the sounders. He then turns the disc 20 of that particular sounder so that its projection 24- is above the part- 18 and this sounder then delivers a loud clear tone. After the message has been received, the disc should be restored to its initial position.

If the stud 17 engages the arm 18 to deliver the loud note, the projection 24 may be It will also be evident that the device may be easily reversed by placing the disc or some similar element upon the part 18 instead of upon the lever 13.

Having thus described my invention, it will be evident that other changes and modifications may be made in my invention by those skilled in the art Within the spirit and scope thereof as set forth in the claims. and I do not Wish to be otherwise limited to the details herein disclosed, but what I claim is: j

1. In a telegraph sounder, a frame, an armature, a lever pivoted to said frame, adjusting means effective to determine the normal range of movement of said lever, and an additional adjusting device effective to determine for said lever a relatively long or a relatively short stroke independent of said normal adjusting means, said device having two separate engaging portions and being selectively movable to either one of tWo definite operative positions in each of which one engaging portion only is effective to determine the length of stroke.

2. In a telegraph sounder, a frame, an armature, a lever pivoted to said frame. means to determine the normal range of movement of said lever, and a disc seated against said lever, ellective by movement on its seat to different selected angular positions to change such range of movement independently of said means.

3. In a telegraph sounder, a fran'ie, an armature, a lever pivoted to said frame. means to adjust the range of movement of said lever, a manually movable disc seated against said lever, effective by angular adjustment on its seat to temporarily change such range of movement independently of said means, and a device to hold said disc in adjusted position.

4:. In a telegraph sounder, a frame, an armature, a lever pivoted to said frame. means to adjust the range of movement of said lever, a disc mounted on said lever. effective to temporarily decrease such range of movement independently of said means. and a spring mounted on said lever and irictionally engaging said disc to 'n'event displacement thereof.

5. in a telegraph sounder. a frame. an armature, a lever pivoted to said frame. means to adjust the range of movement of said lever. and a disc adjacent said lever having projections of different lengths at different points on its periphery, difl'erent' projections engaging said frame in different pore ions ol. said disc and varyingi the range of movement of said lever.

In testimony whereof I have hereunto atlixed my signature.

J OHN ll. Kl N'SLEY. 

